Door knocker



FIG. 1 is a perspective view of a door knocker constructed in accordance with, and embodying, the principles of the present invention;

FIG. 2 is a front elevational view of the door knocker depicted in FIG. 1;

FIG. 3 is a side elevational view of the door knocker depicted in FIG. 1, the opposite side elevational view being a mirror image;

FIG. 4 is a top elevational view of the door knocker depicted in FIG. 1; and,

FIG. 5 is a bottom elevational view of the door knocker depicted in FIG. 1.

The surface(s) or portion(s) of the article not shown in the drawing or described in the specification form(s) no part of the claimed design. 

The ornamental design for a door knocker, as shown. 